SYfLLIDAE 127 



Benham {he. cit.) gives an account of a stolon at a much later stage. 



Fauvel suggests that T. gigaiitea may be a giant form of T. zebra. I have had a lot 

 of material of Mcintosh's species through my hands, and I confess that I have seen 

 nothing that leads me to support Fauvel 's view. 



Trypanosyllis taeniaeformis (Haswell) (Fig. 19). 



Augener, 1913, p. 230, and 1924, p. 374. 

 Monro, 1933, p. 35. 



Occurrence. St. 929, New Zealand (2). 



Specific characters. A smaller species than T. gigantea. The larger specimen 

 measures 45 mm. by 2 mm. for 183 chaetigers. There is a pair of orange brown, trans- 

 verse, equal bands in each segment for about the anterior third of the body. The head is 

 bilobed, slightly incised behind. There are two pairs of large eyes. The median tentacle 

 is about three times as long as the head and the laterals 

 two-thirds of this. Upper tentacular cirrus about a third 

 as long again as the median tentacle and the lower about 

 half this. The dorsal cirri are alternating and have a violet 

 colour. The longer are about equal to the breadth of the 

 body, and the shorter about two-thirds of this. The 

 pharynx has a crown of about 10 teeth surrounded by 

 a circlet of 12 papillae. The bristles are bidentate. 



One of these specimens is in the chain phase. The 

 stolon is not budded off from the last segment of the 



stock, but comes off from the 183rd chaetiger and leaves Fig. 19. Trypanosyllis taeniaeformis. 



the tail-end of the stock folded underneath the ventral ^^"t""^' ^'^^ °^ beginning of 

 surface (Fig. 19). I cannot count the number of segments 



in this tail piece, but it is equal in length to the five preceding chaetigers. The stolon 

 is clearly marked off both dorsally and ventrally from the stock. It is a female bud filled 

 with eggs and has 35 chaetigers. There are no swimming bristles and apparently no 

 ventral cirri. I cannot see a trace of cephalization. 



Remarks. The specimens from Gorgona Island attributed by me to this species have 

 smaller and more numerous papillae at the mouth of the pharynx, but I find them 

 otherwise indistinguishable. 



I believe this to be the first record of this species from New Zealand, where its place 

 is usually taken by T.picta, Kinberg. The latter species is readily distinguishable by the 

 presence of a large nuchal flap or gibbosity. 



Genus Pionosyllis, Malmgren 



Palps fused at the base. Tentacles and cirri smooth, non-moniliform. A single, 

 anterior, pharyngeal tooth. The rim of the pharynx is smooth. Reproduction direct. 



Anterior dorsal cirri very long ... ... ... ... ... ... ... P. comosa 



Anterior dorsal cirri short. Embryos carried on the back of the female ... P. nutrix 



